Maintenance And Inspection - Hitachi Koki DV 18DCL2 Handling Instructions Manual

6. How to select tightening torque and rotational speed
Use
Machine screw
Driving
Wood screw
Brick
Drilling
Wood
Metal
CAUTION
The selection examples shown in Table 5 should
be considered as general standard. As different
types of tightening screws and different materials
to be tightened are used in actual works proper
adjustments are naturally necessary.
When using the impact driver drill with a machine
screw at HIGH (high speed), a screw may damage
or a bit may loose due to the tightening torque is
too strong. Use the impact driver drill at LOW (low
speed) when using a machine screw.
NOTE
The use of the battery BCL1415 and BCL1815 in a
5cold condition (below 0 degree Centigrade) can
sometimes result in the weakened tightening torque
and reduced amount of work.
a temporary phenomenon, and returns to normal
when the battery warms up.
7. Mounting and dismounting of the bit
(1) After inserting a driver bit, etc. into the keyless drill
chuck, firmly grasp the ring and tighten the sleeve
by turning it toward the right (in the clockwise
direction as viewed from the front) (See Fig. 8).
If the sleeve becomes loose during operation, tighten
it further. The tightening force becomes stronger
when the sleeve is tightened additionally.
(2) Dismounting the bit
Firmly grasp the ring and loosen the sleeve by
turning it toward the left (in the counter-clockwise
direction as viewed from the front) (See Fig. 8).
CAUTION
When it is no longer possible to loosen the sleeve,
use a vise or similar instrument to secure the bit. Set
the clutch mode between 1 and 11 and then turn the
sleeve to the loose side (left side) while operating the
clutch. It should be easy now to loosen the sleeve.
8. Confirm that the battery is mounted correctly
9. Check the rotational direction
The bit rotates clockwise (viewed from the rear
side) by pushing the R-side of the selector button.
The L-side of the selector button is pushed to turn
the bit counterclockwise (See Fig. 9)(The
R
marks are provided on the body).
Table 5
Rotating speed selection (Position of the shift knob)
Clutch Dial
Position
LOW (Low speed)
For 4 mm or smaller
1 – 22
diameter screws.
For 8 mm or smaller nominal
1 –
diameter screws.
For 13 mm or smaller
diameters.
For 32 mm or smaller
diameters. (DV14DCL2)
For 38 mm or smaller
diameters. (DV18DCL2)
For drilling with a metal
working drill bit.
CAUTION
10. Switch operation
NOTE
11. For drilling into brick
This, however, is
12. Using the bit holder
CAUTION
(1) Removing the bit
(2) Installing the Bit

MAINTENANCE AND INSPECTION

1. Inspecting the tool
and
L
For 6 mm or smaller
diameter screws.
For 4.8 mm or smaller
nominal diameter screws.
For 8 mm or smaller
diameters. (DV14DCL2)
For 10 mm or smaller
diameters. (DV18DCL2)
For 18 mm or smaller
diameters. (DV14DCL2)
For 22 mm or smaller
diameters. (DV18DCL2)
Always use this unit with clockwise rotation, when
using it as an impact drill.
When the trigger switch is depressed, the tool
rotates. When the trigger is released, the tool stops.
The rotational speed of the drill can be controlled by
varying the amount that the trigger switch is pulled.
Speed is low when the trigger switch is pulled slightly
and increases as the trigger switch is pulled more.
A buzzing noise is produced when the motor is about
to rotate. This is only a noise, not a machine failure.
Excessive pressing force never increases drilling
speed. It will not only damage the drill tip or reduce
working efficiency, but could also shorten the service
life of drill bit. Operate the impact driver drill within
10-15 kg pressing force while drilling into brick.
Stow the bit in the specified location on the tool.
If the tool is used with the bit stowed improperly,
the bit may fall and cause bodily injury.
Do not stow bits that are of a different length,
gauge or dimension than the plus driver bit (65 mm
long) included in the STANDARD ACCESSORIES.
The bit may fall and cause bodily injury.
Securely hold the main unit and pull out the bit
by holding the tip with your thumb (Fig. 10).
Install the bit with steps opposite of when removing.
Insert the bit so that the right and left sides are
equal, as shown in Fig. 11.
Since use of as dull tool will degrade efficiency and
cause possible motor malfunction, sharpen or
replace the tool as soon as abrasion is noted.
English
HIGH (High speed)
12